Difference between revisions of "Part:BBa K782002"

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==Introduction==
 
==Introduction==
  
Transcription activation like (TAL) effectors are bacterial plant pathogen transcription factors that bind to DNA by recognizing a specific DNA sequence in which each base pair binds a single tandem repeat in in the TAL DNA-binding domain. A tandem TAL repeat contains 33 to 35 amino acids, where the 12th and the 13th amino acid, called a “repeat variable diresidue” (RVD)  are responsible for specific interactions with the corresponding base pair (Scholze and Boch, 2011).  All TAL repeats have almost identical sequences, differing only in the RVDs. This modularity of TAL effector binding domains therefore makes them a perfect tool to target specific DNA sequences by designing specific binding domains for a selected TAL effector. We designed seven consecutive specific binding sites for [https://parts.igem.org/wiki/index.php?title=Part:BBa_K782011 NicTAL12:KRAB] and [https://parts.igem.org/wiki/index.php?title=Part:BBa_K782009 TALD:KRAB] upstream of CMV promoter (Figure 1). After binding of NicTAL12:KRAB or TALD:KRAB on binding sites, a repression of reporter protein mCitrine occurs. mCitrine is yellow fluorescent protein.  
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Transcription activation like (TAL) effectors are bacterial plant pathogen transcription factors that bind to DNA by recognizing a specific DNA sequence in which each base pair binds a single tandem repeat in in the TAL DNA-binding domain. A tandem TAL repeat contains 33 to 35 amino acids, where the 12th and the 13th amino acid, called a “repeat variable diresidue” (RVD)  are responsible for specific interactions with the corresponding base pair (Scholze and Boch, 2011).  All TAL repeats have almost identical sequences, differing only in the RVDs. This modularity of TAL effector binding domains therefore makes them a perfect tool to target specific DNA sequences by designing specific binding domains for a selected TAL effector. We designed seven consecutive specific binding sites for [https://parts.igem.org/wiki/index.php?title=Part:BBa_K782011 NicTAL12:KRAB] and [https://parts.igem.org/wiki/index.php?title=Part:BBa_K782009 TALD:KRAB] upstream of CMV promoter (Figure 1). After binding of NicTAL12:KRAB or TALD:KRAB on binding sites, a repression of reporter protein mCitrine occurs. mCitrine is yellow fluorescent protein.
Single binding sequence for NicTAL is: TCTATCAATGATAGA   
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Single binding sequence for NicTAL is: TCTATCAATGATAGA   
  
 
Single binding sequence for TALD is: TCGTCCAATAGCTTCTC
 
Single binding sequence for TALD is: TCGTCCAATAGCTTCTC

Revision as of 16:53, 25 September 2012

4x[NicTAL]+4x[TALD] operator_CMV promoter_mCitrine

  • TALD label represents TAL effector 1295 from zebrafish experiments (Sander et al., 2011).

Introduction

Transcription activation like (TAL) effectors are bacterial plant pathogen transcription factors that bind to DNA by recognizing a specific DNA sequence in which each base pair binds a single tandem repeat in in the TAL DNA-binding domain. A tandem TAL repeat contains 33 to 35 amino acids, where the 12th and the 13th amino acid, called a “repeat variable diresidue” (RVD) are responsible for specific interactions with the corresponding base pair (Scholze and Boch, 2011). All TAL repeats have almost identical sequences, differing only in the RVDs. This modularity of TAL effector binding domains therefore makes them a perfect tool to target specific DNA sequences by designing specific binding domains for a selected TAL effector. We designed seven consecutive specific binding sites for NicTAL12:KRAB and TALD:KRAB upstream of CMV promoter (Figure 1). After binding of NicTAL12:KRAB or TALD:KRAB on binding sites, a repression of reporter protein mCitrine occurs. mCitrine is yellow fluorescent protein.

Single binding sequence for NicTAL is: TCTATCAATGATAGA

Single binding sequence for TALD is: TCGTCCAATAGCTTCTC


7xNicTAL+7xTALD.png

Figure 1. Shematic representation of four consecutive specific binding sites for NicTAL and TALD upstream of CMV promoter and reporter protein mCitrine.


  • mCitrine was provided from host lab.
  • Binding sites for TAL effectors were ordered from IDT.


References

Scholze, H., and Boch, J. (2011) TAL effectors are remote controls for gene activation. Curr. Opin. Microbiol. 14, 47-53.

Sander, J. D., Cade, L., Khayter, C., Reyon, D., Peterson, R. T., Joung, J. K., and Yeh, J.-R. J. (2011) Targeted gene disruption in somatic zebrafish cells using engineered TALENs. Nature Biotechnology 29, 697–698


Sequence and Features


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    COMPATIBLE WITH RFC[12]
  • 21
    INCOMPATIBLE WITH RFC[21]
    Illegal BamHI site found at 270
    Illegal XhoI site found at 900
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    INCOMPATIBLE WITH RFC[25]
    Illegal AgeI site found at 35
    Illegal AgeI site found at 235
  • 1000
    COMPATIBLE WITH RFC[1000]